From 446b87443ccfd96f58b568f2a298a2236764cf95 Mon Sep 17 00:00:00 2001
From: Your Name <your.email@example.com>
Date: Mon, 25 May 2026 21:15:44 +0800
Subject: [PATCH] fix: align world splat initial orientation

---
 components/canvas/world3d/World3DViewer.tsx | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/components/canvas/world3d/World3DViewer.tsx b/components/canvas/world3d/World3DViewer.tsx
index c4051ebf7..b1f1613ce 100644
--- a/components/canvas/world3d/World3DViewer.tsx
+++ b/components/canvas/world3d/World3DViewer.tsx
@@ -100,6 +100,8 @@ const DEFAULT_MESH_SETTINGS: Model3DViewerSettings = {
   wireframe: false,
 };
 
+const WORLDLABS_ASSET_ROTATION: [number, number, number] = [Math.PI, 0, 0];
+
 const EMPTY_MOVEMENT_STATE: MovementState = {
   forward: false,
   backward: false,
@@ -1322,7 +1324,7 @@ function WorldSplatScene({
     revealCompletedRef.current = false;
     setParticleCloudData(null);
     splatMesh.frustumCulled = false;
-    splatMesh.rotation.set(0, 0, 0);
+    splatMesh.rotation.set(...WORLDLABS_ASSET_ROTATION);
     applySparkRevealProfile(sparkRenderer, splatMesh, SPLAT_LOADING_PROFILE);
 
     let cancelled = false;
@@ -1949,7 +1951,7 @@ function WorldSplatViewer({
       <Model3DViewer
         emptyStateTitle="准备加载 3D Mesh"
         layerVisibility={fallbackMeshLayerVisibility}
-        modelRotation={[Math.PI, 0, 0]}
+        modelRotation={WORLDLABS_ASSET_ROTATION}
         modelUrl={resolvedFallbackMeshUrl}
         onCaptureReady={onCaptureReady}
         onLayersChange={onFallbackMeshLayersChange}
@@ -2087,7 +2089,7 @@ export function World3DViewer({
         <Model3DViewer
           emptyStateTitle={emptyStateTitle}
           layerVisibility={meshLayerVisibility}
-          modelRotation={[Math.PI, 0, 0]}
+          modelRotation={WORLDLABS_ASSET_ROTATION}
           modelUrl={meshUrl}
           onLayersChange={onMeshLayersChange}
           onStatsChange={onMeshStatsChange}